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Consider a cylinder filled with air with a piston and spring arrangement on top. The spring is 55 cm with the piston loaded, the diameter of the cylinder is 30cm and the height compressed is 15cm. The external pressure is 1 bar, the initial temperature of the air in the cylinder is 25 C. The no-load length of the spring is 50cm and the spring constant is 40000 N/m. The piston weighs 500 kg. You can assume the constant volume heat capacity of air to be constant at 20.9 J/(mol K). a. Compute the initial pressure of the gas in the cylinder. b. Compute how much heat must be added to the gas in the cylinder for the spring to compress by 2cm. You can treat the air as an ideal gas and assume that delta u is given by the product of the constant volume heat capacity and delta T.
2 NO(g) + O2(g) 2 NO2(g) In one experiment 0.633 mole of NO is mixed with 0.354 mole of O2. Calculate also the number of moles of NO2 produced.
32.5 kJ/mol°GD Muscles are powered by the hydrolysis of Adenosine tri phosphate determine Keq for this reaction
The half-life of 137Ce is 30. years. If we have 150.000 g of 137Ce now, how many grams of Ce will remain in 150. years?
How much PV work is done, if 90 grams of ethylene and 120 grams of HCl are allowed to react at atmospheric pressure and the volume change is -71.2 liters?
Compute ΔHo fusion and ΔSo fusion for this substance If the pressure is increased to 120 bar, the melting temperature increases to 375.88 K..
What do you expect will happen to the position of this equilibrium when the total pressure of the gases in the reaction mixture is doubled by injecting some argon (Ar) while maintaining the temperature constant.
Suppose that a 4.0 L sample of gas at 1.0 atm is heated from 44°C to 53°C, during this process the volume doubles. What will the final pressure of the gas sample be
A saline solution contains 171 mEq/L each of Na+ and Cl-. how many moles of each of Na+ and Cl- are in 1.50 L of the saline solution.
A fluoridated water supply contains F- at a concentration of 8.9 ppm. What is the maximum concentration of Mg2+ that can exist in this water supply without causing precipitation.
How much heat (in kJ) is evolved in converting 1.20 mol of steam at 134.0°C to ice at -55.0°C.
Calculate the number of moles and molality of the solution prepared by dissolving 4.00g of NaOH in 250.0g of water.
Determine the theoretical and percent yields of ethanol if 684g sucrose undergoes fermentation and 349g ethanol is obtained?
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